[单选题]
A proton strikes an oxygen-1p ug6 7hv dn9,wt,u-wd8 nucleus producing fluorine-18 and anpb4m3h)qm 4r rother particle. What rhrq3b4pmm) 4 other particle is produced by this nuclear reaction?
A. a neutron
B. an $\alpha$ particle
C. an $b-$ particle
D. an $b+$ particle
